Hard tissue resorption in a standing tooth is a process resulting whose bone loss occurs cement or dentin tooth. Question about the prevalence of this conditions require study with new opportunities for early reliable diagnosis sticks based on conical lucomputed tomography (CBCT), being a standard survey of a matologic patient in clinics dentistry clinic systems MEDI, as well as using the reading algorithm and interpretation of computer tomоgram developed by SPbINSTOM.